Question

A body of mass 50 kg has a momentum of 3000 kg m/s. Calculate the kinetic
energy of the body and the velocity of the body ​

Answer 1

Answer:

(i) m = 50 kg, p = 3000 kg ms-1  

Since  p = mv

∴  v = p/m = 3000/50 = 60ms-1  

Kinetic energy of the body = 1/2mv2  

= 1/2 x 50 x (60)2 = 25 x 3600

= 90000 J

(ii) Velocity of the body v = 60 ms-1

Step-by-step explanation:

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Answer 2

Answer:

60 m/s

90000 J

Explanation:

We have,

=> Mass (m) = 50 Kg

=> Momentum (p) = 3000 Kg.m/s

To find,

=> Velocity (v)

=> Kinetic energy (K.E)

Solution,

Momentum(p) = mass(m) × velocity(v)

=> 3000 = 50 × v

=> v = 3000/50

=> v = 60 m/s

Kinetic energy = 1/2 × mass × velocity²

=> K.E = 1/2 × 50 × 60²

=> K.E = 25 × 3600

=> K.E = 90000 J